Boiler



April 3, 1928.

C. B. BOYNTON BOILER Filed Feb. ll, 1925 IN V EN TOR.

M. BY

' ATT NEY.

' l'tbetween them and'the Patented Apr. 3, 1928.

p Viuni'ren :ASTM-:Ers

resrelaePAT-ENT ormen CH-RLES 'B. BOYNTON, OF EAST ORANGE, NE'W JEBSEY,ASSIGNOE TO PERCO I-IEATER CORPORATION, OF NEWARK, NEW JERSEY.

BOILER.

Application filediFebruary 11, y1925. Serial fNo. 8,366.

This invention relatesto boil'ers, particularly "'houseiheating fboilers and 'is designed tepr'ovide' a'rboiler' that quicklyvaporizes the water inte "steam and 'with a lminimum amount of vfuel and at the same time'is of'a simple -and economical construction.

lThe finv-entio'n "isf J-a-rtieularly directed to that type of boilerithatf includes a percolating tube oi11 tu'bes and is designed' to 'quickly and inten'sly heat Vthe L'Water 'inithe iboiler and tube butithe parts are disposed so 'that a'ic'onstantfsupplyof water is assured to the vei'yl'top *fthe per'colating tube Athus increasing 'the 4efficiency Land also preventing the burning out or cracking of parts of the boil'er.

The invention also relates to certain details ofconstruction which v'Will be hereinafter'niore 'fully described and 'finally embodied in the k'ola-uses of'the claims.

The inve'ntion'is illustrated in the accompanyingdrawing in which Figure L1 s a vertical section of aboiler made accordi'ng'to mjy Ain-vel'ntio'n, the 'front lower part thereof being'shownlinelevation and Figure 2 is a seetion on lin'ef2-2 in Figure :1. V V

The 'boiler comprises any suitable form of b'ase 'within Which is the usualash pit which als'o jsupportsi'the grate and the i lower boil'er section 'Ilfrests 011 .thefbase and is annular in 1the 'form shown but,'of'cou1se, can-'be square or of -any other suitable 'form in cross-section, the outer wall 12 'and the inner :wall v13 providng the lWater =chamber I, inner wall 13 clesing the firebox 15. I

The 'lower section also forms f at a part thereof the i lower I, portion of the' p'ereolating tube or tubes and in'theiform showniI show two 'tubes which, while they may be made of piping,'arepreferably made integral with the-lower section. These lower portions consist lo'fizreturn elbows '16 which project into thefire'box and are adapted to receive Water at theloiver end adjacent'to the inner wall 13 and (theyhaveftheir outletY ends y*17 arranged within the annularV space or chaniber 14 and at the top ith'ereof. p In extension 'of these outlet endsil' I arrangethe pipes'1'8 which complete thepercolating tube and'have their upperL ends 1:9 1bent to diree'tlfthe Water,

Which ascendsthrough the percolating tube,

to:the-desiredlpointiin the top section. v

LOne :form of top section is 'shown 'at '20 chamber of the topsection, the'intervening i space'between'the central portion 24 andthe main .portion .of the top section forming a passage '26 for the heat andsmokefrom the fire '-box .and which escapes through the smoke pipe 27.

The lower edge 28 of lthe' passage 25 is lower than 'the rim 23but is slightly'higher than the top 'face of the :bottom'22 so that the :water in the top fsection overfiows through the'passage -25 o'nits return to the lowler section. "I'prefer to Juse a supplem'e'ntal top ysection '29 which is Vpreferably flatian'd shallo'wan'd w-hich is connected by a nipple SOto the .top sectionffandF/h'as an outlet pipe 31 'which 'passesfloutside the heater and 'has its .lower 'en'd'r32fentering into the' lower sec-- tion l11.

Whereithe pipe l'leavesthe supplemental t'op section 219 it isg'disposedat a -s'light ydistance above-'the bottomi'thereof so Vthat there vis 'always asmall vq'uantity of water yin the section 29 and the water must rise to the level oft-he lonf'erT-edge of this pipe 31' before there is -anyoverfl'ow Of eou1'se,with the he'ater in *operation-this'fiow of water in the top *section and supplemental topsection'is constantsince while these s'hallow bodies of water 'are-:quickly heated and converted inte steam my construction of boiler insures a con'stant and ample supply of hotV water through the ltje'rcolating pipe dueflto the fact that-the party -of the 'percolating pipe above the=water line is not subjected to the'direct heat from the fire'hox as it is surrounded by a steampipe 33 which oonveys steam from thema'in body of watery in the heater to the top section. I

'One of these pipes surrounds each 'of the 'percolating' tubes .and *while they may be directly 'connected *with theibottom'seetion I show in the drawing an intermediate sectionfwhieh*acts -as 'an equalizer in that itiinsures an ample'supplyrof Waterwhen the *heater V'is *being forced'end thusy insures the percolating tube always having a' full supply. This intermediate section has the fiue openings 85 and the bottom a thereof forms the top of the fire box.

, The heat passes through the flue openings 35, through the space 36 between the inter-w out through the space 26.

The. advantages of this construction will' be evident when it is not'ed thatit has been found in the ordinary typeof percolating boiler than when it is being forced and when the fire is very hot the percolating tube becomes so hot that the water .therein is converted into steam and often all that issues from the top of the -percolating tube is steam. This has resulted in dry top sections which have hurned out or have cracked when water is finally deposited on them and many replaceinents of sections have therefore been necessary, making the repair and the boiler expensive to say nothing of the inconvenience of having the boiler out of Commission.

VIn, this form of boiler as at present made the water in the percolating tubesv is thoroughly heated at the vbottom of the tube and thereby forced positively upward to the percolating tube but the upper part thereof is shielded or separated from the main heat flues .or passages of the boiler so that the water is not vaporized or if vaporized at all is, vaporized but little' and the percolating tubes deposit water near the boilingpoint on the plate 22 of the top section. There it is quickly converted into steam on account of its being very shallow and what overfiows is further subjected as a shallow body to vaporization in the supplemental top section 29. f o i In addition to this the water in the intermediatesection 34: is boiling and the steam therefrom passes through the tube ort tubes 33 into the top section. The number of connections necessary in a boiler of this form is small and the manufacture therefor is inexpensive. i i

It will also .be noted that the tubes 33 pass up through openings in the supplemental top section 29 with suflicient clearance to permit heat to pass up around Vthe tubes 33 so that the tubes 33 arenot only kept hot thus min- I imizing condensation in the tubes 33 but the shielding of the percolat-ing tubcs 18 from the direct heat is enough to assure the full capacity of water passing upthrough the percolating tubes without' such water being converted into steam before it arrives in the top section;

It will be evident that minor changes can be made in the arrangement of the parts Without departingfrom the scope of the invention. 1

I claim:

1. A boiler comprising a lower water Chamber inclosing a fire box, an upper section. a percolating tube forming a return bend in the fire box and having its upper portion disposed so as to deposit water into the upper section, and a tube to convey steam V from the lower part of the boiler to the upper section, said last mentioned tube in! closingthe percolating tube above the water line.

2; A boiler comprising a 'lower section and an upper section for containing water,

the' lower section having an' annular water chamber inclosing a fire box and having return elbows extending-from the inner walls thereof into the fire box and pipes tow conend of the sectiond and pipes seated in said i upper ends to conduct water from the elbows into the top section; i i

any. annular water Chamber and a return elb-ow proj ecting 'from the inner Wall' thereof into the fire box, said return elbow having its inlet communicating' with the annular water Chamber and its outlets situated so as to conduct water from said section.

i 5. A boiler comprising a lower section includingan annular water Chamber inclosing a fire box and having a return elbow extendingr into the fire'bo'x with its outlet end in thewater chamben'a percolat-ing tube on the end of'the elbow, a top sectioninfwhichthe upper end of the percolating tube is situated,

retainingr bottom and a central Outlet spaced therefrom to form a smoke passage and having a water passage to fpermit escape of the overfl-ow. a'supplemental top section to Vreceive said 'overfiow and having 'an outle't slightly above its bottom to insure a shallow body of water therein, a connection between the supplemental section and the lower section. and a steam' pipe'connectingV the lower section with the top sectionof said steam pipe surrounding the percolating tube.V i'

6. A boiler comprising a lower section including an annular water Chamber inclosing a fire box and having a return elbow extendin;r into the fire box with its outlet end' in the water Chamber, apercolating tube on the end of the elbow, a top section which the .4. In a boiler, a lower section comprising lll) 'the top section comprisinga shallow water V Lee/geia upper end of the percolating tube is situated, the top section comprising a shallow Water retaining bottom and a central Outlet spaced therefrom to form a smoke passage and having a Water passage to permit escape ot' the overfloW, a supplemental top section to receive said overflow and having an outlet slghtly above its bottom to insui'e a shalloW body ot' Water therein, a connection between the Supplemental section and the lower section, an intermedate section ot relatively large capacity on the lower section and in communication therewith, and a steam pipe connecting the'top of the nterinediate section With the top section and enclosing the percolating tube.

In testimony Whereot' I afiix my signature.

CHARLES B. BOYNTON. 

